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• Optimising Database Calls

  - by Dwaine Bailey

  I have a database that is filled with information for films, which is (in turn) read in to the database from an XML file on a webserver. What happens is the following: Gather/Parse XML and store film info as objects Begin Statement For every film object we found: Check to see if record for film exists in database If no film record, write data for film Commit Statement Currently I just test for the existence of a film using (the very basic): SELECT film_title FROM film WHERE film_id = ? If that returns a row, then the film exists, if not then I need to add it... The only problem is, is that there are many many hundreds of records in the database (lots of films!) and because it has to check for the existence of a film in the database before it can write it, the whole process ends up taking quite a while (about 27 seconds for 210 films) Is there a more efficient method of doing this, or just any suggestions in general? Programming Language is Objective-C, database is in sqlite3 Thanks, Dwaine

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• Requirements of an issue/bug tracker

  - by James Brooks

  I've been looking at various issue/bug trackers available on the net. There are some very good ones, but I'm unable to use them as my server does not support Perl/Ruby (for example), I'm not too bothered however because I am able to write code in PHP and as such would prefer something in that language. So I've taken it upon myself to write a custom issue tracker system. As of now it's in early planning stages, and before I continue, I'd like to find out what people need from such an application. My current list of things to add include: Creating/Editing/Deleting issues - both on user and admin level Related issues (similar to that of STO) Admins will be able to create builds/milestones and version control of projects Admins will be able to assign users/groups to a project Roadmap of projects Possible SVN integration with Git? What do you think? There are a couple more things I'd like to add, but I'm sure you'll think of a better way of adding such feature. What would you like to see from an issue tracker?

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• Keyboard focus being stolen by Flash

  - by NewUser

  Performing a search, I noticed several questions dedicated to how to steal/trap the keyboard focus of the visitor. Considering this site is dedicated to programming that's not suprising. I was wondering if anyone can advise me on how to prevent this type of behavior. Losing keyboard focus to flash basically removes my browser's functionality until I use the mouse to click elsewhere (I use Mozilla Firefox). Anyone know of some kind of plugin or greasemonkey script that will prevent my keyboard focus from being stolen? Normal browser "shortcuts" are rendered useless by having to use the mouse to return keyboard focus to the browser. Edit: Reply to the post below, I do have flashblock / noscript and some other things. My issue is flash that I want to see/interact with stealing my focus. Basically looking for something I can toggle that will prevent flash from getting keyboard focus or a way to force my firefox keyboard commands to the browser

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• mailbox in PHP How be designed

  - by sandy

  How do I design mailbox in my site ... I am new to the PHP language ... And asked me to design mailbox for each member in my site... As the site contains the members, personal page for each member and the incoming fund that in which he can read private messages as well as send new messages, and also keep the messages sent .. How do I do that ...???? I just want a guideline for the right way .... How do I start to design ..???

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• verilog or systemc for testbench

  - by Alphaneo

  I am assigned with the task of verifying some verilog based RTL code. Now, coding the RTL testbench using verilog seems to be very difficult (for me). So I would like to try one of the following. - Try providing a PLI interface to the RTL and thereby invoke 'C functions for testing - Using system 'C for interfacing the 'C functions PS: I already have a extensive 'C code that was used for testing the behavioral model. I am new to the world of hardware programming. Any pointers would be greatly appreciated.

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• Is there a free (as in beer) Flow chart generator for COBOL Code?

  - by btelles

  Hi I've never read COBOL in my life and have been tasked with rewriting the old COBOL code in a new language. Are there any free or free-to-try software packages out there that will generate a flow chart for a COBOL program? I've looked at "Visustin" and "Code Visual to Flowchart" Visustin blanks out part of the code and does random rotations in the demo version, which causes the demo to be less accurate. I couldn't get Code Visual Flow Chart to work correctly with our code. Know of any other packages I might try?

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• Expression Web 4 - Master Page Error

  - by Eric J.

  I created an ASP.Net Web Application in VS 2010. That in turn creates an example Site.Master, Default.aspx, and several other example files. I then opened Default.aspx in Expression Web 4 and get the error message The Master Page file 'Site.Master' cannot be loaded. Default.aspx can still be displayed fine in VS 2010. Source.Master: <%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="SampleWebApp.SiteMaster" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head runat="server"> <title></title> <link href="~/Styles/Site.css" rel="stylesheet" type="text/css" /> <asp:ContentPlaceHolder ID="HeadContent" runat="server"> </asp:ContentPlaceHolder> <style type="text/css"> .style1 { font-family: Tunga; } </style> </head> <body> <form runat="server"> <div class="page"> <div class="header"> <div class="title"> <h1 class="style1"> My Application Master Page</h1> </div> <div class="loginDisplay"> <asp:LoginView ID="HeadLoginView" runat="server" EnableViewState="false"> <AnonymousTemplate> [ <a href="~/Account/Login.aspx" ID="HeadLoginStatus" runat="server">Log In</a> ] </AnonymousTemplate> <LoggedInTemplate> Welcome <span class="bold"><asp:LoginName ID="HeadLoginName" runat="server" /></span>! [ <asp:LoginStatus ID="HeadLoginStatus" runat="server" LogoutAction="Redirect" LogoutText="Log Out" LogoutPageUrl="~/"/> ] </LoggedInTemplate> </asp:LoginView> </div> <div class="clear hideSkiplink"> <asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="false" IncludeStyleBlock="false" Orientation="Horizontal"> <Items> <asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home"> <asp:MenuItem NavigateUrl="~/Home/NewItem.aspx" Text="New Item" Value="New Item"></asp:MenuItem> <asp:MenuItem NavigateUrl="~/Home/AnotherItem.aspx" Text="Another Item" Value="Another Item"></asp:MenuItem> </asp:MenuItem> <asp:MenuItem NavigateUrl="~/About.aspx" Text="About"/> <asp:MenuItem NavigateUrl="~/ContactUs.aspx" Text="ContactUs" Value="ContactUs"> </asp:MenuItem> </Items> </asp:Menu> </div> </div> <div class="main"> <asp:ContentPlaceHolder ID="MainContent" runat="server"/> </div> <div class="clear"> </div> </div> <div class="footer"> </div> </form> </body> </html> Default.aspx: <%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="SampleWebApp._Default" %> <asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent"> <style type="text/css"> .style2 { color: #669900; } .style3 { background-color: #FFFFCC; } </style> </asp:Content> <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <h2> Welcome to MY page! </h2> <p> To learn more <span class="style2"><strong><em><span class="style3">about</span></em></strong></span> ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>. </p> <p> You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&amp;clcid=0x409" title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>. </p> </asp:Content> Any idea how to get the master page to work properly in Expression Web 4?

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• Machine learning in OCaml or Haskell?

  - by griffin

  I'm hoping to use either Haskell or OCaml on a new project because R is too slow. I need to be able to use support vectory machines, ideally separating out each execution to run in parallel. I want to use a functional language and I have the feeling that these two are the best so far as performance and elegance are concerned (I like Clojure, but it wasn't as fast in a short test). I am leaning towards OCaml because there appears to be more support for integration with other languages so it could be a better fit in the long run (e.g. OCaml-R). Does anyone know of a good tutorial for this kind of analysis, or a code example, in either Haskell or OCaml?

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• Using Java server-side with PHP-generated front-end

  - by Storm

  Hi!  Does anyone have a real-world experience in building such a project? I'd like to move away questions about "is it good idea or not", but focus on possible solutions. I see one simple way - HTTP GET/POST + xml/json - and one more elegant - AJAX/DWR. As for the first one - I understand that it is possible, but needs quite a lot coding. As for second way - is it possible to use Java DWR engine with PHP front-end? Is DWR language-independent for client side (as it uses just JavaScript)?  Would it be a problem, that client page was generated by one web server (for example, apache+php) and served on server-side by another (for example, tomcat)? I suspect, that Tomcat will complain about sessions. Can this problem be fixed with allowing cross-domain AJAX? Thank you in advance. Denis.

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• Convert PDF to PDF/A-1

  - by AZtec

  I know this probably is not strictly a programming-question (well maybe it is, i don't know) but i'm having serious problems trying to convert a regular pdf (with hyperlinks, bookmarks, images, embedded fonts etc.) into a PDF/A-1 format. I get all kinds of errors when i check it with pdfaPilot. How can i prepare a pdf so no problems will occur when i try to convert to PDF/A-1. Most problems can be fixed with pdfaPilot but apparently not all. One of the problems i get is with the XMP Metadata which are "not properly defined". Wat exactly does this mean, and can i do something to prevent this. Another one is: "Syntax problem: Array with more than 8191 elements" (i hope this one is solvable) I hope someone can help me out here, since i'm in a tight spot right now with deadlines that are killing me.

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• print customized result in prolog

  - by Allan Jiang

  I am working on a simple prolog program. Here is my problem. Say I already have a fact fruit(apple). I want the program take a input like this ?- input([what,is,apple]). and output apple is a fruit and for input like ?-input([is,apple,a,fruit]) instead of default print true or false, I want the program print some better phrase like yes and no Can someone help me with this? My code part is below: input(Text) :- phrase(sentence(S), Text), perform(S). %... sentence(query(Q)) --> query(Q). query(Query) --> ['is', Thing, 'a', Category], { Query =.. [Category, Thing]}. % here it will print true/false, is there a way in prolog to have it print yes/no, %like in other language: if(q){write("yes")}else{write("no")} perform(query(Q)) :- Q.

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• Caching Profiles web.config vs IIS

  - by Lieven Cardoen

  What is the difference between configuring a Caching Profile in Web.Config and configuring it in IIS? If you have this in Web.Config <caching> <outputCache enableOutputCache="true" /> <outputCacheSettings> <outputCacheProfiles> <add duration="14800" enabled="true" varyByParam="*" name="AssetCacheProfile" /> </outputCacheProfiles> </outputCacheSettings> </caching> And nothing configured in IIS in the Output Caching, will it work? And what if you add all the extensions I use in Output Caching in IIS, what does that change? It's a aspx page RetrieveBlob.aspx that uses this Caching Profile: <%@ OutputCache CacheProfile="AssetCacheProfile" %> <%@ Page Language="C#" AutoEventWireup="true" CodeFile="RetrieveBlob.aspx.cs" Inherits="RetrieveBlob" %>

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• How to write software for my touchpad?

  - by Nona Urbiz

  I have some ideas for improvements on my touchpad, ranging from the run of the mill scroll horizontally at the bottom, tapzones for right click, to more complicated ones. But I have no idea where to get started? I'm working on Windows 7 Home Premium, its an Asus laptop, and I have none of these options natively available to me. Regardless, I want to write something that anyone can use. Where would I start? (it'd be nice to write in c++? is that possible? what are the requirements here? what language would be recommended?)

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• Estimate gaussian (mixture) density from a set of weighted samples

  - by Christian

  Assume I have a set of weighted samples, where each samples has a corresponding weight between 0 and 1. I'd like to estimate the parameters of a gaussian mixture distribution that is biased towards the samples with higher weight. In the usual non-weighted case gaussian mixture estimation is done via the EM algorithm. Does anyone know an implementation (any language is ok) that permits passing weights? If not, does anyone know how to modify the algorithm to account for the weights? If not, can some one give me a hint on how to incorporate the weights in the initial formula of the maximum-log-likelihood formulation of the problem? Thanks!

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• Code editor with autocomplete

  - by Andrey

  I need to create a code editor for my own simple language: className.MethodName(parameterName = 2, ... ) I've created the appropriate grammar and autogenerate parser using ANTLR tool. Now I would like to have an autocomplete for class, method, variables and parameter names. This list should be context dependent, f.e. for "class." it should display methods and for "class.Method(" - parameters. I was going to parse the text and display the list depending on in which node the cursor is. The problem is that for incomplete code like "aaa.bbb(" the parser produces an error instead of a syntax tree. Any idea how to solve this problem? Maybe I'm on the wrong way and I shouldn't parse code to display autocomplete?

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• Does pdksh (public domain korn shell) support associative arrays?

  - by George Jempty

  I recently ran up against a wall doing some bash shell programming where an associative array would have solved my problems. I googled about features of the Korn shell and learned that it supports associative arrays, so I installed Cygwin's pdksh (public domain korn shell). However, when trying to create an associative array in the prescribed manner (typeset -A varName), I received the following errors, so I'm beginning to suspect pdksh does not support associative arrays. ./find_actions.ksh: line 2: typeset: -A: invalid option typeset: usage: typeset [-afFirtx] [-p] name[=value] ... Guess I'll be considering Perl instead, but I really wanted a good excuse to learn a dialect/language new to me

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• Web form / CGI scripting: User enters "word", IFrame displays "word".html

  - by Haskella

  Okay, I'll admit being a designer, I don't know much about how data is handled from the servers in forms... (basically the whole programming part). Basically I have a text field that the user types something like "apple", this gets sent to the server and then displays the apple.html page that I have in a directory in an IFrame. If anyone can show me how to do this in a PHP script or Perl, would be great thanks! I think this is good start, it gets more complicated than this... I later have to convert the "apple" into something like 2321 and display 2321.html instead. If anyone can find a CGI script that does this, thanks!

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• PHP protected classes and properties, protected from whom?

  - by Andrew Heath

  I'm just getting started with OOP PHP via PHP Object-Oriented Solutions and am a little curious about the notion of protection in OOP. The author clearly explains how protection works, but the bit about not wanting others to be able to change properties falls a bit flat. I'm having a hard time imagining a situation where it is ever possible to prevent others from altering your classes, since they could just open up your class.php and manually tweak whatever they pleased seeing as how PHP is always in plaintext. Caution: all of the above written by a beginner with a beginner's understanding of programming...

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• Error messages for model validation using data annotations

  - by oneBelizean

  Given the follow classes: using System.ComponentModel.DataAnnotations; public class Book{ public Contact PrimaryContact{get; set;} public Contact SecondaryContact{get; set;} [Required(ErrorMessage="Book name is required")] public string Name{get; set;} } public class Contact{ [Required(ErrorMessage="Name is required")] public string Name{get; set;} } Is there a clean way I can give a distinct error message for each instance of Contact in Book using DataAnnotations? For example, if the name was missing from the PrimaryContact instance the error would read "primary contact name is required". My current solution is to create a validation service that checks the model state for field errors then remove said errors and add them back using the specific language I'd like.

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• Modbus driver: C vs Java

  - by cpf

  Hi stackoverflow, I am soon going to start a project where I'm required to program a Modbus driver. My initial approach was to want to do it in Java, however my boss has had contact with a company that has experience in Modbus, and they said C is the better language to approach Modbus. So my boss pretty much demanded it to be in C. My C knowledge is not really big, so it would require me to learn enough to get the Modbus driver working in proper and stable order. So, my question to you stackoverflow people with some experience in Modbus: how important could the choice of C vs Java be? The modbus site seems to have Java libraries, if C was so superior to Java in every way, why would they have those libraries? Would it be useful to learn C properly for the advantages that might give?

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• git hooks - regenerate a file and add it to each commit ?

  - by egarcia

  I'd like to automatically generate a file and add it to a commit if it has changed. Is it possible, if so, what hooks should I use? Context: I'm programming a CSS library. It has several CSS files, and at the end I want to produce a compacted and minimized version. Right now my workflow is: Modify the css files x.css and y.css git add x.css y.css Execute minimize.sh which parses all the css files on my lib, minimizes them and produces a min.css file git add min.css git commit -m 'modified x and y doing foo and bar' I would like to have steps 3 and 4 done automatically via a git hook. Is that possible? I've never used git hooks before. After reading the man page, I think I need to use the @pre-commit@ hook. But can I invoke git add min.css, or will I break the internet?

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• What is a simple way to combine two Emacs major modes, or to change an existing mode?

  - by Winston C. Yang

  In Emacs, I'm working with a file that is a hybrid of two languages. Question 1: Is there a simple way to write a major mode file that combines two major modes? Details: The language is called "brew" (not the "BREW" of "Binary Runtime Environment for Wireless"). brew is made up of the languages R and Latex, whose modes are R-mode and latex-mode. The R code appears between the tags <% and %. Everything else is Latex. How can I write a brew-mode.el file? (Or is one already available?) One idea, which I got from this posting, is to use Latex mode, and treat the code of the form <% ... % as a comment. Question 2: How do you change the .emacs file or the latex.el file to have Latex mode treat code of the form <% ... % as a comment?

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• Django: Admin with multiple sites & languages

  - by lazerscience

  Hi everybody! I'm supposed to build some Django apps, that allow you to administer multiple sites through one backend. The contrib.sites framework is quite perfect for my purposes. I can run multiple instances of manage.py with different settings for each site; but how should django's admin deal with different settings for different sites, eg. if they have different sets of languages, a different (default) language? So there are some problem s to face if you have to work on objects coming from different sites in one admin... I think settings.ADMIN_FOR is supposed to be quite helpful for cases like this, but theres hardly any documentation about it and I think it's not really used in the actual Django version (?). So any ideas/solutions are welcome and much appreciated! Thanks a lot...

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• [Iphone] - Problem in saving file using NSCoding

  - by Matte Gary

  Hi everybody, I've a problem with Iphone programming... I've a NSMutableArray containing object of type "MyClass". MyClass has some parameters, like NSNumber and NSString. I've followed the Apple Tutorial about coding and decoding object using NSCoding, but when I try to decode the file I've stored, the NSMutableArray contain object of type "MyClass", but with wrong parameters. I think i've done all I've to do (including protocol, including methods like initwithencode etc), but it's still not working... Any suggestions? Thanks a lot! And sorry for my English XD

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• Active X Development: VC++ or VB or Other technologies

  - by Gopalakrishnan Subramani

  We are in the process of creating active-x controls used within our application. Since Microsoft stopped supporting classic Visual Basic, is it wise to use Visual Basic to develop the Active X control or the latest VC++/ATL/MFC libraries provide more feature where we can create controls faster by leaving Visual Basic flexibility? We will not be able to use .NET/VB.NET/C# since the application is supposed to work inside containers and containers may not support latest .NET runtime. Any other language is best fit for Active X control development other than VB and VC++?

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